Purple-green optical cable with 24 cores

A purple-green 24-core optical cable typically uses the TIA-598-C color coding system, where green identifies the buffer tube and purple identifies individual fibers within that tube.

Fiber and Tube Identification

In high-core-count cables, such as a 24-core cable, fibers are grouped into buffer tubes, each following the 12-color TIA-598-C sequence. For example, in a 24-fiber cable: The first 12 fibers are in the first tube, following the standard 12-color sequence: Blue, Orange, Green, Brown, Slate, White, Red, Black, Yellow, Violet, Rose, Aqua. The second 12 fibers are in the second tube, often distinguished by a tube color (green in this case) and may include a purple fiber to indicate its position within the tube.

Thus, a purple fiber in a green tube would correspond to fiber #22 in a 24-core cable, following the calculation: divide the fiber number by 12 to determine the tube, then locate the fiber within the tube.

Jacket and Fiber Type

The outer jacket color of the cable provides information about the fiber type: Aqua or violet jackets usually indicate OM4 multimode fiber, optimized for high-speed data (10G–100G) over short distances. Green jackets may indicate OM5 multimode fiber, supporting SWDM applications for multiple wavelengths. Yellow jackets indicate single-mode fibers (OS1/OS2) for long-distance telecom or ISP backbones.

In your case, a purple-green cable likely refers to a green buffer tube containing purple-colored fibers, and the jacket may be customized for identification or OEM purposes.

Applications

A 24-core purple-green optical cable is commonly used in: Data centers for high-density interconnects and backbone links.

FTT

H (Fiber to the Home) or ODN networks, where multiple fibers are routed in a single cable. High-speed multimode networks, supporting 10G, 40G, or 100G connections over short to medium distances.

Summary

Green: buffer tube color. Purple: individual fiber within the tube. 24 cores: two 12-fiber groups, each following TIA-598-C color coding.

Fiber type: likely OM4 or OM5 multimode, depending on jacket and manufacturer. Use: high-density, high-speed network installations. This color-coded system ensures accurate fiber identification, reduces splicing errors, and simplifies maintenance in complex optical networks.